See if you can find a used one , I have seen some like new for $700 . there isnt a good knockoff acog out there. it would just be a $100 waste that you could have used on the real deal . Save your money , even it it takes a couple years . I have owned several of the knock offs and I have upgraded most all of my stuff to quality optics with just one cheap red dot left and its been a good one for me the rest were all junk and most of them was a a wasted $60- $100 each . My only issue is just recently and below 20 degrees it dims on the shot but comes back immediatly , could be a low battery its not been changed in 5 years